Why does natural selection appear to happen slowly on long timescales and quickly on short ones? A multigenerational study of four lizard species addresses biology’s “paradox of stasis.” James Stroud ...

The movement of genetic material between organisms that aren’t directly related is a significant driver of evolution, especially among single-celled organisms like bacteria and archaea. A team led by ...

During California’s worst dry spell in the past 1,200 years, some populations of wildflowers defied the odds to survive the ordeal. Researchers say they now believe these flowers relied on a type of ...